IDL Wavelet Toolkit User's Guide

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84 Chapter 4: IDL Wavelet Toolkit ReferenceReferenceTorrence and Compo, 1998: A Practical Guide to Wavelet Analysis. Bull. Amer.Meteor. Soc., 79, 61–78.ExamplesPlot the Gaussian wavelet function at scale=20:n = 1000 ; pick a nice number of pointsinfo = WV_FN_GAUSSIAN( 2, 20, n, /SPATIAL, $WAVELET=wavelet)plot, waveletNow plot the same wavelet in Fourier space:info = WV_FN_GAUSSIAN( 2, 20, n, $FREQUENCY=frequency, WAVELET=wave_fourier)plot, frequency, wave_fourier, $xrange=[-0.2,0.2], thick=2Version History5.4 IntroducedSee AlsoWV_CWT, WV_FN_MORLET, WV_FN_PAULWV_FN_GAUSSIANIDL Wavelet Toolkit
Chapter 4: IDL Wavelet Toolkit Reference 85WV_FN_HAARThe WV_FN_HAAR function constructs wavelet coefficients for the Haar waveletfunction.NoteThe Haar wavelet is the same as the Daubechies wavelet of order 1.SyntaxResult = WV_FN_HAAR( [Order, Scaling, Wavelet, Ioff, Joff] )Return ValueThe returned value of this function is an anonymous structure of information aboutthe particular wavelet.Tag Type DefinitionFAMILY STRING ‘Haar’ORDER_NAME STRING ‘Order’ORDER_RANGE INTARR(3) [1, 1, 1] Valid order range [first, last, default]ORDER INT 1DISCRETE INT 1 [0=continuous, 1=discrete]ORTHOGONAL INT 1 [0=nonorthogonal, 1=orthogonal]SYMMETRIC INT 0 [0=asymmetric, 1=symm., 2=near symm.]SUPPORT INT 1 [Compact support width]MOMENTS INT 1 [Number of vanishing moments]REGULARITY DOUBLE 0d [Number of continuous derivatives]Table 4-9: Structure Tags for ResultIDL Wavelet ToolkitWV_FN_HAAR
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IDL WaveletToolkit User’sGuideIDL
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ContentsChapter 1Introduction to th
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Chapter 1Introduction to the IDLWav
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Chapter 1: Introduction to the IDL
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Chapter 1: Introduction to the IDL
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Chapter 2Using the IDL WaveletToolk
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Chapter 2: Using the IDL Wavelet To
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IDL Wavelet Toolkit User's Guide

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